Effect of Ni, Si and Cr in the structural formation of diffusion aluminide coatings on commercial-purity titanium

Microstructure and hot corrosion behavior of hot dip siliconized coating on Ni-base superalloy IN738LC

“…Silicon can form a promising protective barrier to withstand the diffusion of oxygen in high-temperature oxidation conditions, through formation of silicides [21]. Therefore, a protective layer, containing SiO 2 , could be formed through the hot dip siliconizing of Ni-based superalloys [22,23]. This inhibits the oxygen diffusion into the surface of base metal [21].…”

Oxidation behaviour of glass–quartz and glass–quartz–aluminium composite coatings on Ti–6Al–4V alloy

“…[1][2][3] However, their oxygen sensitivity limits their potential abilities at high temperatures, 4 as non-protective oxide scale will emerge and spall off Ti alloys. At the same time, high temperature oxidation of Ti alloys will result in a brittle oxygen rich sublayer beneath the oxide scale.…”

Oxidation protection of commercial-purity titanium by Na2O–CaO–SiO2 and Na2O–CaO–Al2O3–SiO2 glass–ceramic coatings

“…However, at high temperatures, titanium and titanium alloys show great oxygen sensitivity, subsequently with a brittle non-protective oxide scale formed on their surface, which results that their maximum use temperature is only about 500 1C [2][3][4].…”

“…For example, protection coatings were deposited on commercialpurity titanium and TiAl-based alloy by hot-dip aluminizing [2,3,5]. Ti-Cr-Al coatings were prepared on TiAl alloys by magnetron sputtering [6]; other protective coatings such as Ti 5 Si 3 /γ/TiSi composite coatings on γ-TiAl intermetallic alloy by laser cladding [7], Al-Si coatings on Ti-6Al-4V by vacuum fusing method [8,9] were also successfully produced on titanium and titanium alloys.…”